Taxonomic placement of Onuris hauthalii (Brassicaceae: Eudemeae) based on morphology and multilocus species tree analyses

SALARIATO, D.L.; F.O. ZULOAGA

KEW BULLETIN

Royal Botanic Gardens, Kew

Lugar: Kew; Año: 2015 vol. 70 p. 1 - 8

0075-5974

Summary. Onuris hauthalii is a species distributed in Southern Argentina and Chile. Its generic assignment hasbeen controversial, being included in Eudema, Brayopsis and Onuris. In order to clarify its generic affinities, westudied its morphology and phylogenetic relationships using multilocus/multispecies coalescent species-treeanalyses based on four DNA regions (ITS, trnL-F, trnH-psbA, and rps16 intron). Results show that while O. hauthalii isrelated to Onuris s.s., it represents a well-differentiated lineage characterised primarily by having branchedrhizomes, rosette flowering with ebracteate flowers, and latiseptate silicles. Based on the morphological andmolecular evidence, we place this species in the new monospecific genus Alshehbazia. A description, morphologicalkey, updated geographical distributions, map, and illustration are provided.